Common ProblemsCan my brother and I play together on the same WoW license?
The Battle.net End User License Agreement explains what you may and may not do with a Blizzard account. This article highlights a few passages from the EULA that are most relevant to this policy.
Account Access Limitations
Only you are allowed to access an account registered in your name. We don't recognize the transfer of accounts between individuals. Activities performed on your account are your liability.
You may not share your account or password with anyone, except if you are a parent or guardian, in which case you may permit one minor child to use your account. You may not use your account at the same time, and you are liable for activies conducted by the minor child.
You are responsible for maintaining the confidentiality and the use of your user name and password. You are responsible for all uses of your information, even if you don't authorize them. Security of your account is your responsibility.